I love pull to refresh and I wanted to add it to iOS. Mark's video is awesome showing you how to use custom renderers, so I applied his practices to iOS:
http://motzcod.es/post/87917979362/pull-to-refresh-for-xamarin-forms-ios
the source is on github:
https://github.com/jamesmontemagno/Xamarin.Forms-PullToRefreshListView
here is a video:
